Short answer
To sign a PDF on Windows with SpeedAI PDF, use the planned visible signature tools to draw your signature or type your name, place the signature on the PDF, resize it to fit the signature line, then save the signed copy as a standard PDF.
Visible signature vs. digital certificate
A visible signature is the signature most people mean when they say "sign this PDF." It is a drawn, typed, or image-based signature placed on the page so another person can see that the document was signed.
A certificate-based digital signature is different. It uses cryptography, certificates, and identity validation. That matters for some legal, government, and enterprise workflows, but it is not what most daily PDF signing tasks require.
| Signature type | Best for | V1 SpeedAI PDF scope |
|---|---|---|
| Visible signature | Forms, contracts, approvals, school documents, client paperwork | Planned |
| Digital certificate signature | Identity-verified workflows and regulated approvals | Not planned for V1 |
Step-by-step PDF signing workflow
- Open the PDF in SpeedAI PDF.
- Find the signature field or blank area where the signature belongs.
- Create a signature by drawing with a mouse or touchpad, or typing your name in a handwriting style.
- Place the signature on the page and resize it to match the form.
- Save a signed copy and reopen it to confirm the signature appears correctly.
What to check before sending
After signing, reopen the PDF and look at the exact page where the signature was placed. Check that the signature is visible, not covering important text, and included in the saved file rather than sitting only in an app overlay.
If the PDF is a form, also confirm that the form values were saved. Many users discover too late that a browser preview printed the form but did not preserve the completed fields in the file they shared.
How SpeedAI PDF approaches signing
SpeedAI PDF V1 is planned around practical visible signatures. Users should be able to draw or type a signature, place it on the PDF, and save the result without needing an Adobe-style toolset or a certificate-signing workflow.
This is intentionally narrow. For V1, SpeedAI PDF is not promising cryptographic signing, identity verification, or certificate management. That keeps the everyday workflow easier to understand.
FAQ
Can I sign a PDF without Adobe Acrobat?
Yes. SpeedAI PDF is planned to handle visible signatures for many everyday signing tasks without Adobe Acrobat.
Is a visible PDF signature legally valid?
Legal validity depends on the document, jurisdiction, consent, and workflow. SpeedAI PDF V1 focuses on placing visible signatures, not legal identity verification.
Can I fill a form before signing?
Yes. The common workflow is to fill the PDF form first, then add the signature after the fields are complete.